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Nothing worse than rescue and planning for that energy efficiency scheme and then having the contractor lose the potential savings because of poor ability work. Whether we're talking about attic insulation or new windows, the right contractor can make the dissimilarity between zero discount in energy usage and a 40% reduction.
Before you head for the yellow pages and put your money on the dotted line, know that a job done well will effect in energy savings and a job done poorly will not. To get your scheme headed in the right energy efficiency direction, ask your power company to recommend a contractor or two. Chances are they have already weeded out the bad ones.
The energy Audit:
If your not sure that you have prioritized your energy efficiency projects correctly, you may be ahead-of-the-game to have an energy Pro check your home and your retrofit wish list. Trained energy auditors will be able to assessment a retrofits potential energy savings and help you prioritize the retrofits in descending order of cost effectiveness. Here again, your power victualer or your State Dept. Of energy may be a good resource for identifying great energy Auditors.
If the energy Auditor shows up at your front door with a pickup load of impressive equipment, ask him or her in. If all they have is a company brochure and an invoice, tell them you have changed your mind and would like to reconsider. Please understand - a sloppy contractor can categorically short-sheet your potential energy savings, but an ill prepared energy auditor is even worse.
Research and Data:
From all around the country, data from government weatherization programs has been pouring in for years. Some counties will do 200 weatherization retrofit's per year and are holding up that hectic pace so they can whittle down their 600 home waiting list. If your driving down a narrow residential road and you see a small box truck with writing on the side that says "County Weatherization", you know somebody is being issued a smaller power bill through energy efficiency retrofits. Stop and give them a pat-on-the-back, both the contractor and the homeowner.
Some of this weatherization retrofit data has provided some surprising results. By analyzing the data, the true cost-effective retrofit has been identified and quantified. Some old beliefs as to what was rescue energy had to be sent to the bottom of the list and some things had to be retrieved from the bottom and placed near the top.
Household energy Education:
When household energy schooling was added to a weatherization program, the weatherization retrofits produced additional energy savings. Data indicated that the lifestyle of the household and their awareness of potential energy waste impacted the effectiveness of the energy rescue measures.
Quality energy Pro:
The more an energy Auditor is prepared and managed, the more prosperous the retrofits. A categorically sharp auditor is able to recognize the retrofits that lead to the most cost-effective energy measures. By effectively prioritizing energy efficiency measures, the auditor is able to increase energy savings.
Winter / Summer:
Winter heat loss and summer heat gain are categorically dissimilar animals and wish strangely dissimilar measures. Those retrofit projects that are so efficient in Arizona did not fair too well in North Dakota. Investigate performed on the bungalow by the palm trees had to be thrown out the window when the house was moved to the rain forest of the Olympic Peninsula. Be particular reading that great description in the absorb about duplicate low-E glass for windows, might not be such a good idea in your neck-of-the-woods.
Big House/ Check Mechanical:
Data indicates that your best opening of finding necessary energy rescue opportunities in a large house will be found in the mechanical system. In a atmosphere where degree heating days outnumber degree cooling days, look at the heating theory to find areas where energy efficiency can be increased and energy savings can be realized. Cooling days outnumber heating days, look to your cooling theory to find energy savings. Also, the bigger the house, the more energy is used by lighting. Power discount can be realized with energy efficient lighting fixtures and bulbs.
Duct Leakage, No Joke:
During preliminary tests on homes and determining areas of energy waste, researchers were surprised to learn how much the duct theory contributes to energy waste and the potential for energy savings. First of all, ducts have a lot of holes, more than one would think. Second, the air that leaks through those holes causes a lot of high-priced trouble. With duct leakage, you end up paying for conditioned air you never get to use and the leaking creates air pressure differences that increases air leakage through the covering walls. It's the duplicate whammy.
Insulation as an Air Barrier: Blown insulation that can be dense packed in a cavity will act as a poor mans air barrier. Cellulose is a type of insulation that can be packed in a wall cavity to a density that will sell out the transmittance of air through the wall. This takes a diminutive practice, if your going to dense pack and do it yourself, good spend a diminutive time with a pro first. If your going to have a contractor do it, don't assume they know what they are doing, like I said, dense packing is not for the dense.
Thermal Resistance:
The thermal resistance of insulation is greatly reduced if air is allowed to flow around it or through it. This is where your air barricade comes into play - insulation should be placed next to a sealed and continuous air barrier. Insulation, setup it correctly or you might as well not setup it at all. Insulation is one of the most cost effective, energy rescue retrofits you have, unless you setup it in a wind tunnel.
Windows and Doors:
Too bad doors and windows cost so much - they look good, but they just cost a lot. If the window or door is secure, weatherstripped and in good working order, it is not a cost efficient weatherization measure to replace it. The payback duration on a window can be 30 years if you are just figuring energy savings - if you are figuring how they look from the street, the payback duration is reduced to the eye-of-the-beholder. Too often doors and windows are substituted when they could be repaired. Door and window weatherstripping can be replaced.
Higher the Usage, the More the potential Savings: As an example, a 900 quadrate foot home with electrical usage of 800 kW/h per month has a potential energy savings of 10%. A 3,600 quadrate foot home that uses 2,400 kW/h has a potential energy savings of 35%. This is simple math, the more you use - the more you can save. The normal assumption of the house sleeping in a large home built in 1995, is that they have it made - big newer home, everything, energy-wise, is modern and Ok. Little-do-they-know, they maybe having morning meal in the worst energy hog on the block.
In all this energy efficiency and energy savings, computerized energy audits furnish more energy savings than a pad of paper and a sharp pencil. Auditors and weatherization programs that use computerized modeling as a part of the audit process increased the ration of efficient energy savings at comparable homes. The modeling provided additional facts concerning cost effectiveness and the retrofit scheme as a whole.
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